Relay system



H. 0. HUGH.

RELAY SYSTEM.

APPLICATION FILED MAYIZ, I919.

1,337,797, Patented Apr. 20, 1920.

I 'i Q I I Q: 6 MA 4 lifiy 5M E 7 2-M Z no 67w M a W HARRY 0. RUG-H, OF CHICAGO, ILLINOIS.

RELAY SYSTEM.

Specification of Letters Patent.

Patented Apr. 20, 1920.

Application filed May 12, 1919. Serial No. 296,356.

To all whom it may concern:

Be it known that I, HARRY O. RUGH, a citizen ofthe United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Relay Systems, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which my invention appertains to make and use the same.

My invention relates to relay systems, and more particularly to relay signaling systems, and is particularly adapted for use in a telegraph system, or other similar signaling system. A principal object of my invention is to provide for the breaking of a local energizing, circuit of a telegraph sounder or similar signal device, after a predetermined length of time, even if the controlling main line circuit which initiates the closure of the said energizing local circuit is continuously closed.

In the system of my invention, the usual telegraph sounder may readily be replaced with a buzzer tone signal device, and it is a further object of .my invention, therefore, to provide a system wherein buzzer tone signals may be given without the consequent annoyance of having the buzzer continuously operated when the main telegraph circuit is continously closed, as for instance after the sending of a message. Such a continuous buzzer signal would be quite annoying, and it is a further object of my invention to provide in such a system, an audible tone signaling device adapted to operate uder the control of a standard unmodified telegraph line relay, to faithfully produce in tone audible signals, the dots and dashes of the Morse telegraphic code, at the same time the signal device being rendered'entirely inoperative during the intervals whenrtelegraphic signals are not being transmitted or received. A further object is to effect a current saving when messages are not being sent over the telegraph line.

Other objects of my inventionare to so construct thev mechanism that it will be positive in operation, inexpensive to manufacture, and when adjusted, to be adapted to remain in a proper adjustment for long periods of time without'attention.

Other objects of my invention and the invention itself will be made more apparent to those skilled in the art by the following description of the same in which reference will be had to the drawing accompanying this specification.

In the drawing at L, I show a telegraphic line relay serially included with a telegraph key, in series with the conductors l and 2 of a telegraph line, together with a source of current B. The line conductors 1 and 2 may be, for the purpose of describing this invention, understood to lead to a distant station having a like key and line relay as well as other associated controlled apparatus as illustrated for the station A. A vibratory tone signal device is shown at V, having a sonorous member S, adapted to be operated by the impact of an armature-hammer H, striking on an anvil rod AR, which is shown as being operatively connected to a'diaphragm D, of the said sonorous member. The arrangement is such that when the armature-hammer H, strikes the anvil member AR, the diaphragm D, is agitated and thev sonorous member S, is caused to emit sound vibrations producing a tone, the volume of the tone being amplified by an amplifying horn AH. An electro-magnet E, and circuit breaking contacts C, are provided to control the vibratory movement of the armature-hammer H.

A slow operating relay mechanism RM, is provided having an electro-magnet M, armature MA, and normally closed contacts CT. A retractile spring 3, is provided for the armature H, of the device V, to normally maintain the contacts C, closed, and likewise a retractile spring 4, is provided for the armature MA, of the mechanism RM, to normally maintain the contacts, CT, closed.

The construction of the relay, RM, is such that it is of the type known in the art, as a slow operating relay, the armature only responding to current impulses of normal strength which are continued for a considerable period.

I find that a relay constructed substantially as shown, in the drawing at RM, may be made to operate sufliciently slow, that it will fail to operate on current impulses corresponding in length to the ordinary dots and dashes of the Morse code, although responding readily, upon a continued closure of" the circuit, which continued closure produces a current impulse of conthe dots and dashes of the Morse code are being sent. Due to such an operation of the distant key, the armature LA, of the line relay will be vibrated substantially in unison with the sending key to produce intermittent closures of the line relay contacts CL. These closures produce a sounding of the signal by the sonorous member S, of the audible tone signal V, as each closure completes a circuit for the winding of-the ac-- 'tuating electro-magnet E, thereof. This circuit may be traced as follows :-From the positive pole of the source of current, BY, through the closed contacts CL, of the relay L, circuit conductor 5, the winding of the electro-magnet E, normally closed contacts C of the electro-magnet E, circuit conductor 6, normally closed contact CT of the relay mechanism RM, circuit conductor 7, circuit conductor 8 to the ne ative pole of the source of current BY. multiple circuit across the conductors 5 and 8, including the winding of the electro-magnet M, is provided, to energize this electro-ma et from'the source of current BY, in llIllSOIl with the energizations of the signal device V. But the relay mechanism R being slow operating though relatively nick releasing, the brief energizations of t is electro-magnet M, during the tele graphic sending period, will not be of suflicient duration to cause the electro-magnet to attract its armature MA, so that the contacts CT, in the circuit of the magnet E,

of the signal device V, will not be broken.

RM, causes the armature of the slow operating relay Thus, the signal device remains operatively connected in circuit with the controllin contacts CL, and the source of current BY due to the inactivity of the armature MA, mechanism RM; this during the sending period.

But upon a prolo ed closure of the contact CL, as produce for instance, by the final closure of the distant telegraphic key after the sending ofthe message, the relay mechanism RM, will be operated due to the prolon ed energization of its magnet M, include in the circuit with the controlvl'rn contact CL, of the source of current BY.

mechanism A, to be attracted, moving froml its normal circuit closing position to its circuit opening pohe operation of the rela ing in current consumption is to be had,

due to the opening of the contacts CT, in

the circuit of the signal device in the intervals between telegraphic signal periods.

Having now described a particular embodiment of my invention, I desire to state that I am aware that numerous and extensive departures may be made from the said embodiment herein illustrated and described, without departing from the spirit of my invention, but what I claim as my invention is defined in the following claims 1. In a telegraph system, the combination with, a main line circuit, of a local circuit,

" the said relay, a slow (pick-up rela' a winding therefor include in one o the said branches, and an electrores onsive device and contacts of said slow re ay serially includeiln in salid othrlalr branch.th b

3. atee p system, ecom ination with a main 5:; relay, of a branched local circuit, a source oicurrent serially included in a main conductor of the said local circuit, an electro-responsive device in one of the branches thereof, a slow responding relay in another branch, an armature for the main line relay, an armature for the slow responding relay said device being under the joint control of said main line and slow responding relay armatures.

4. In a signaling system, the combination with a telegraph signal device, of a slow responding relay, a common. source of energizing current for the said device and said relay, a main line relay, contacts of said line relay included in circuit with the said source to control the said device and the said relay, and means under the control of the said relay controlling the said device.

5. In a signaling system, the combination with a main relay, of a slow responding 1S0 and relatively quick retracting relay under the control of the said main relay, a normally closed energizing circuit for the said .main relay, means to interrupt and reclose the said circuit for short or long intervals,

- controlled relay.

6. In a telegraph system, the combination with a main line relay, of a branched local circuit, a source of current serially included in a main conductor of the said local circuit, an electro-responsive device in one of the branches thereof, a slow responding relay in another branch, an armature forthe main line relay, an armature for the slow responding relay, said device being under the joint control of said main line and slow responding relay armatures, said last named armature being under the control of the other armature. r

7. In a telegraph system, the combination with a main line relay, an armature therefor, a slow pick-up relay, an electro-responsive device, an energizing circuit for the slow pick-up relay, an energizing circuit for the said device, -said device being adapted to give a continuous signal as long as itsenergizing circuit is closed, an armature for the slow pick-up relay, a set of contacts controlled by the pick-up relay armature and a set of contacts controlled by the main line relay armature serially included in the said electro-responsive device energizing circuit, said slow pick-up relay circuit being under the control of the said main line relay armature.

In witness whereof I hereunto subscribe my name this 9th day of May A. D. 1919.

HARRY O. RUGH. 

